Hybrid Car – More Fun with Less Gas

Hey do you know your car's alternator only outputs 7-10% while it's running? - Page 13

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Posted by bw on August 10, 2009, 7:46 pm

Model T was 1800 max.

In the USA "high speed" engines of the pre-WW2 era were 3600 RPM
The flathead ford v8 was the exception at 3200 RPM

After WW2 most engines stayed at 3600 rating, but the "redline" went to 4000

RPM and compression generally increased in the 20th century as balance and
metal technology advanced.
Europe generally pushed the RPM higher before the USA

Posted by News on August 10, 2009, 9:36 pm

It may reverse back to lower revving engines.  The Chevy Volt runs by
electric motor propulsion. It was designed to have a constant speed engine
design run at the most efficient speed, turning a genny which provides power
to the electric motor.  As the motor demands more power, it puts an
increased magnetic field on the genny. This drags the engine's speed down,
but the engine injects more fuel to maintain the constant speed and keep the
genny turning.

I believe GM may make the engine variable speed, and lower efficiency, as
the customers may be disconcerted at experiencing a constant speed revving
engine. Sounds garbage to me.  Who cares about the speed of the engine?

Posted by Rich Grise on August 10, 2009, 10:57 pm
 On Mon, 10 Aug 2009 22:36:21 +0100, News wrote:

The driver. It could be disconcerting, especially to Aunt Tillie, when
the sound of the motor doesn't change through acceleration, braking, etc.


Posted by News on August 11, 2009, 1:25 am

Since when has a woman ever taken any notice of noises coming from the

Posted by Son of a Sea Cook on August 11, 2009, 2:24 am

  Good point, but the obvious answer is:

 "Whenever the noise has no bearing on the operation of anything..."

  I know my script.

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